Haven't read any replies so sorry if I am repeating anyone i know you mentioned it might be raining but all my mothers group kiddies turned 3 this year and the biggest hit was the jumping castle! Two parties had one and the kids just bounced themselves silly lol. Pass the party was another one but I did notice that the ones that only had a prize at the end for one winner were not well received by the little ones. The ones that had a prize in each layer per child were great, no meltdowns or tears afterwards!

Have fun planning!