Reading the reviews put fear into my heart but I was relieved to find this was no more difficult to assemble than any other large mobile toy.  My wife (bless her heart) told me about the videos and that cut the time and frustration levels to near "0".  There is a need for some strength in grip and the ability to use an open-handed "wack" to seat things in place so those older grandparents or those with arthritic conditions may need a second pair of hands (or a light rubber mallet).  An electric screwdriver is also recommended.