Help with itinerary

Hi
We have planned a 6 day trip to Switzerland, excluding travel in and out of the country. We are planning to do the following. We are traveling with two young kids, so dont want to make the trip very hectic. One thing we would really love to do is see Matterhorn, but given the itinerary below, we cant squeeze in the Glacier express for 7.5hrs each way. The plan is to do some hiking and lots of sight seeing. If there are other places you would suggest, do let us know. We also wanted to see Lugano, Thunersee river and Rhine Falls, but not sure if we can fit it in. Suggestions would be appreciated.

Day1 Arrive at Zurich - Take train to Lucerne
Day2 Lucerne (Mt Pilatus)
DAy3 Lucerne (Mt Titlis)
Day4
Lucerne -> Interlaken (stay at Lauterbrunnen)

DAy5 Lauterbrunnen (Jungfraujoch, go via Grindelwald, First and come back via
Kliene Scheidegg)
Day6 Lauterbrunnen (Schilthorn, Wengen/Murren)
Day7 Lauterbrunnen -> Zurich
Day8 Leave from Zurich

Sounds good. Thanks for the suggestion. Any tips on other places we could visit? The only thing we are trying to avoid here is packing the itinerary with places to go in quick succession that missing the train or taking longer on one would cause a ripple effect. In your opinion, if you think there are other places that are worth going to and can be fit into the itinerary, do let us know.

Thanks

Dear happyncool, if the weather is cloudy when you are in Lucerne and you want an alternative to Pilatus or Titlis, may I suggest you go to the VerkehrsMuseum (transport museum) - the kids would absolutely love it as it is very hands-on - the exhibits themselves (trains, boats, buses, planes etc) are very well presented with tons of information and there are lots of interactive things for them to try out. There is also an area where they can drive model dumper trucks and other road building vehicles, scooping up stuff etc - hard hats etc provided to make it feel authentic. When we went there (without children of our own) we had a lot of fun watching children having fun! Maggie

Thanks Maggie - This would be an excellent choice for my kids who are super crazy about trucks.