Cool idea! Once a month for their lives, put $10 in a photo album for your kids....around $2000 by the time they graduate/turn 18. what a wonderful gift to start out their "new lives"! maybe wait until they get married??
buy the wood from home depot, use the screws to hook the chains with and make it the size of a twin size bed....buy an old twin size mattress from goodwill cover it in plastic then in outdoor fabric to make a cool swing for the covered patio....whoop whoop