I'm planning for a trip to swiss.. wat are the places to see in 7 days.
Please name the MUST SEE places

you MUST SEE (and buy) his:
http://shop.lonelyplanet.com/switzerland/switzerland-travel-guide-6?lpaffil=lpdest-shoppod

Seven days and the MUST SEE places: no way.
Start a bit more modestly, e.g. by visiting http://www.anholter-schweiz.de/
There's a replica of the Vierwaldstädtersee near Lucerne. A MUST SEE and guarantee you'll manage in the limited time.
There are more mini-Switzerlands, probably more convenient for access. Please tell what are your transport oprions.

"Must-see" places don't exist anywhere in the world - it's your trip so you should make sure you see what you want to see. In addition to the suggestions made by previous posters, have a look at [www.myswitzerland.com].
Please find below copies of answers to similar questions in some older TT posts, as a starting point for own researches:
SOME PLACES NOT TO MISS IN SWITZERLAND
scenic train Chatelard - Emosson, may be combined with the visit of the Chamonix area,
Steam train Furka Pass (until first weekend of Oct)
Entirely walled medieval town of Murten
Roman theatre and museum of Avenches
Menhirs around Grandson
Gorges de l'Areuse and Creux du Van
Watch museums at La Chaux de Fonds and Le Locle
Underground mills of Le Locle
Musical box museums at L'Auberson, Ste-Croix and Seewen SO
Celtic lake dwelling museums at Neuchatel-Hauterive and Biel/Bienne
Caves of Vallorbe, Reclere, Beatus
Medieval city of Berne and it's fine museums
Ballenberg Eco museum and nearby Aar gorges
Lucerne: historic center, Rosengart Museum (Picassos), Glacier mills, steamboats plying the lake, cog railways to Pilatus and Rigi
Baroque churches/monasteries at Solothurn, St. Urban, Einsiedeln, St. Gallen
Subtropical gardens at Brissago Islands, Isola Bella (Italy), Isola Madre (I), Villa Carlotta (I)
Engadin Valley (St. Moritz - Scuol)
Bernina railway
Mustair Monastery
Swiss National Museum at Zurich with dependances at Schwyz, Prangins, Gandria, Wildegg
Aletsch Glacier (Riederalp)
Rhine falls and historic towns of Schaffhausen (with castle) and Stein am Rhein
Medieval Gruyeres with cheese diary and nerby chocolate factory (Cailler at Broc)
etc. etc.
SCENIC RAILWAY, BUS AND BOAT LINES
Glacier Express Zermatt-Brig-Chur-St. Moritz,
Bernina-Express St. Moritz-Tirano,
Golden Pass Montreux-Gstaad-Spiez-Interlaken-Lucerne,
Voralpen Express Lucerne-Rapperswil-St. Gallen
Old Loetschberg line Berne-Spiez-Kandersteg-Brig,
Centovalli line Domodossola-Locarno,
Gotthard railway Lucerne-Airolo-Lugano-Chiasso,
Mont-Blanc-Express Martigny-Chamonix-St-Gervais (-Geneva);
the scenic Alpine post bus lines like:
Grindelwald - Grosse Scheidegg - Meiringen,
Meiringen - Grimselpass - Nufenenpass - Gottharpass - Sustenpass- Meiringen,
Lugano - Lake Lugano - Lake Como - Malojapass - St. Moritz,
Bellinzona - San Bernardino-Tunnel - Viamala Gorge - Chur - Lenzerheide - Davos - Fluelapass - Zernez - Ofenpass - Mustair - Mals - Reschenpass - Martina - Scuol-Tarasp,
Sargans - Vaduz - Buchs SG - Wildhaus - Nesslau - Schwaegalp - Urnaesch (Appenzell);
and do some steamboat and other boat rides on Swiss lakes and rivers, like:
Geneva - Yvoire - Rolle - Lausanne - Montreux - Chillon castle,
Yverdon - Neuchatel - Murten,
Murten - Biel/Bienne - Solothurn,
Thun - Interlaken - Brienz,
Alpnachstad - Lucerne - Vitznau Rigibahn - Brunnen - Fluelen,
Ponte Tresa - Morcote - Lugano - Gandria - Porlezza,
Zurich - Rapperswil - Schmerikon,
Rorschach - Konstanz - Stein am Rhein - Schaffhausen (Rheinfall),
Neuhausen (Rheinfall) - Eglisau.
SWiTZERLAND WITH CHILDREN
As public transport is rather expensive in Switzerland, study carefully the sites about Swiss Pass, Swiss Flexipass and Swiss half fare card: http://www.swisstravelsystem.ch/Tickets.16.0.html?&L=2#s_h_f_c
Check the Swiss Travel System Family Card
The Swiss Travel System Family Card is issued at no cost to parents who wish to take along their children under the age of 16 at no cost. Please note that at least one parent has to travel with the child/ren.
Some ideas:
historic steamboats on Lake Geneva:
http://www.cgn.ch/horaires/pdf/AffA2-ete-10.pdf
http://www.cgn.ch/eng/flotte
Swiss Vapeur Park Le Bouveret:
http://www.swissvapeur.ch/en/index.php
Signal de Bougy:
http://www.parc-aventure.ch/Signal-de-Bougy/
http://www.signaldebougy.ch/
Blonay-Chamby historic railway:
http://www.blonay-chamby.ch/index-en.php
Chillon castle:
http://www.chillon.ch/en/
Gruyeres castle, cheese diary and chocolate factory:
http://www.chateau-gruyeres.ch/e/multimedia/spectacle.html
http://www.la-gruyere.ch/en/navpage-ExcursionsFR-HistSitesFR-120085.html
http://www.lamaisondugruyere.ch/index.php?option=com_content&view=article&id=142&Itemid=56
http://www.lamaisondugruyere.ch/index.php?option=com_content&view=article&id=142&Itemid=56
Chatelard-Emosson (Mont Blanc area):
http://www.chatelard.net/english/pages/descr_e.html
http://en.wikipedia.org/wiki/Emosson
http://www.emosson.ch/PublicEN/default-en.htm
Zermatt-Gornergrat:
http://www.gornergrat.ch/home/index.php
http://www.klein-matterhorn.ch/photos/
http://www.zermatt.ch/en/index.cfm
Entirely walled city of Murten:
http://www.murtentourismus.ch/en/navpage-DestinationsFR-MurtenFR-99305.html
http://www.murtentourismus.ch/en/navpage_list-DestinationsFR-MurtenFR.html
Medieval city of Bern:
http://www.berninfo.com/en/page.cfm/Information
http://www.kleinbahn-gurten.ch/
Swiss Village Park Ballenberg:
http://ballenberg.ch/en/Welcome
Lugano and Swissminiatur:
http://www.lugano-tourism.ch/en/291/default.aspx
http://www.swissminiatur.ch/
Seewen in the Jura close to Basel:
http://www.bundesmuseen.ch/musikautomaten/index.html?lang=en
Rapperswil:
http://www.zuerichsee.ch/en/page.cfm/ExperiencesRZ/FamilyDRZ/1230
http://www.knieskinderzoo.ch/
http://www.zuerichsee.ch/en/page.cfm/SightsRZ
http://www.zuerich.com/en/page.cfm/region_zuerich/region_zuerich_x
Rhine Falls Adventure Park
http://www.rheinfall.ch/Attraktionen/Adventure-Park?lang=en-US
Furka steam train
http://www.furka-bergstrecke.ch/eng/train/timetable.php
You may have a look at
http://www.myswitzerland.com/en/interests/family.html
http://www.takethefamily.com/where/switzerland-family-holidays-and-breaks
http://www.eparenting.co.uk/family_holidays_europe/switzerland.shtml
http://www.reka.ch/en/rekaferien/Pages/default.aspx
http://littletravellers.com/destinations/areas/europe/family-holiday-switzerland/
GLACIER EXPRESS - BERNINA EXPRESS
Glacier-Express and Bernina-Express run slowly through very different areas with completely different mountain village architecture from valley to valley. there are constantly 3 kinds of highlights:
a) nature: mountains, glaciers, forests, mountain lakes, creeks, etc.
b) human buildings on both sides of the lines: villages, churches, castles (inbabited and in ruins), monasteries, alp chapels, wooden bridges, etc.
c) the railway line itself: bridges, tunnels, chalet like railway stations, cog sections, helicoidal bridges and tunnels.....
May be you have a look at the viedos of Glacier-Express and Bernina-Express:
http://www.rhb.ch/Video-Glacier-eng.784.0.html?&L=4
http://www.rhb.ch/Video-Bernina-eng.782.0.html?&L=4
http://www.rhb.ch/UNESCO-Clip-eng.1061.0.html?&L=4