Great house for toddlers, my 16 month old son loves it!  I carried it up my stairs and put it together by myself after he went to bed.  It took about 2 hours for me.  I used a drill along with the screwdriver and I can't imagine doing it without a drill.  Overall the assembly was pretty easy.  I'm hoping to buy a tarp or something to protect it because I know the sun can really discolor it.  We love it though!