We already own about 5 Playmobil castles and I agree they are do not stay together well, but my son loves the building and arranging and finally destruction more than anything else. I know he would flip over legos but I couldnt handle stepping on those hard bricks and the mess involved. Playmobil is much easier to build with too. This will be our first year of Imaginex. It looks like the new Imaginex stuff is pretty much prebuilt and can not be taken apart. My son has been asking for it though so I guess we will wait and see how much play value it really has. One plus is that the Imaginex stuff is much cheaper than Playmobil.