LOVE IT!!!!

Off the top of my head ... things that were popular in the 50's

Hula Hoops ... ou could also make your own hula hoop.... here is a how to video http://www.youtube.com/watch?v=KBreLABeqlI ... decorate them up and can up beans or rice in them to make noise and so forth. Then you could have contest to see who can get it around the most or games with the hula hoop like pass it down the line without 'letting go hands' or something?

Vintage 50's Jewellery was popular - including 'Cameo' necklaces you could make personalized 'Cameo necklaces' using Shrinky Dink paper where you trace their silhoettes and shrink it down either using a photocopier if you have one and transfer to the Shrinky Dink paper and make a necklace adding pearls and what not? Or just google different 'vintage' jewellery and offer up 'inspirations' for them and give a variety of beads and let them make necklaces as they like?

Yo Yo's were popular - so yo yo games?

Slinky's game out too - so race your slinky down the stairs?

Making Old Fashion Milkshakes

Can you get your hands on a really old record player? Cut paper in circles and 'spin the player' while dropping paint onto it to 'make your own record'?

Hope that helps - if anything else pops into my noodle I will come back and add to it