My kids ( 7 and 4) love it and dont understand why we cant go more.
The climber is only one part of it and is not that big.
There are loads of interesting stuff
There are play areas where the kids can pretend to work - a shop, a restuarant, a building site, a garage, a doctors surgery, all with informative stuff like xrays you can look at and a heart rate monitor.
There is a TV news studio where the kids can pretend to be news reader, a stage with dressing up clothes and an area where you can play at being in a band and watch your self on screen.
There is a soft bouncy area for toddlers and an art room.
Well worth a visit, but as was said before, you do need to book.
Buggies are not allowed, so be prepared.