I really thought long whether this size for our twins (3.5 years) is sufficient. Is supposed to be what for longer. Finally, I've just created it and am top satisfied. In theory anyway merely getting a child to jump on it, practically see my two which then but boring. So for 2 children Top sufficient. As they celebrate their birthday in the winter and it was an impractical gift because they have it now get to Easter, but the weather was there also not ideal. So I have it first set up in the living room. Ceiling height fits, is more than enough room for improvement. Coming soon but in the garden. Assembly instructions was going very understandable in Word and Image. Have it as far up alone and have little time needed, but it comes with battery and recorder Bit faster than with the included auxiliary tool. Only in the spring my husband has helped where he actually already really had to apply force (and we are both no weaklings ;-)) Material quality totally super, Conclusion: would buy again!