Soft bodied character having fun?

[luke]

Hello,

I need to create some soft bodied 'characters' (they are letters that spell out a TV channel) that run around, bounce into each other and also sink into a 'bouncy castle' style-ground as they have all this fun. What is the best way of achieving this? Although I have some ideas as to how to apporoach this I am still unsure, as I haven't dealt with charcters that interact with each other before... It's been a long few days, and any advice would be appreciated!

[riki]

Which bit are you having problems with?

[luke]

Well...the characters are already built as they are ones I use regularly. They have various morphs attached (which is the way that I generally animate them). The bit I'm unsure of is whether I should be trying to use Motion designer, or effectors to try and make things happen more 'naturally' and not use keyframes so much. For instance Can I make the floor, objects etc collison targets so that they react when they bump into each other?