Your kids will love Kinderland Reiteralm.
You will find a playground in the snow equipped with some little terrain-park features, a little racecourse and live sized mascots accessible via pommel lifts surrounding the top station of Silver Jet Gondola.
Right at kinderland there are some deckchairs for the grown ups to watch the action.
All designed in lively rainbow colors.The local ski-school uses the Kinderland, but you can also access it privately.
There are some conveyor belt/people mover lifts equipped with a roof, so the kids don't have to walk back up again.
You can access the Kinderland directly from the Reiteralm Silver Jet Gondola.
If your kids are tired of being outside or want to have a hot chocolate, you can either head into Lena Alm or the more decent Jagastüberl.