Groupon has a fantastic deal in their Groupon Goods section: Snag a Step 2 Up & Down Roller Coaster for just $79 with FREE shipping. The open gym that I take my kids to has two of these and they are a total hit. If you have the space in your backyard (or even if you have a daycare), this would be a fantastic addition. Amazon currently has this same item listed at $105!
Limit 3 per person, plus 2 additional as gift. Shipping is not valid to Alaska, Hawaii, Canada or Puerto Rico.