For quite awhile now, I've been obsessed with these.Don't you remember having races with these in PE as a kid? The ones we used were just plain red and so far I haven't been able to find fun ones like the space hoppers above in the United States, but when I do....let's just say, I think it would be the perfect take 5 break during a stressful day. Talk about bouncing back! Think of the parties you could have with these.....for kids.....okay......you know I meant us big kids, too! These are a nostalgic fun gift for any kid at heart. I'm holding out for one of the ones pictured above, but there are all kinds of them on the web. Google kangaroo ball, hop, or hoppity hop.