I can't find a place to review the hydrobikes, so guess I'll just do it here. Long Beach Hydrobikes is located in Los Alamitos Bay and it's a blast! They are basically bikes with pontoons on the side and little paddles that "scoop" the water to propel you instead of regular wheels. My family and I have done this twice and it was a great time both times. You rent the bikes for an hour ($20, but we've found half-price Groupons) and ride them across the bay and through the canals. There are single bikes and double bikes, where little ones can ride on a platform in the middle. My daughter is 10 and this year was able to reach the pedals and do the single bike, but last year was a bit too short and rode on the platform. Having done both, I recommend the single bikes - it is much more fun to pedal on your own. The people who run Hydrobikes are very nice and easy-going, which sometimes translates into not getting on the bikes at the time you reserved them for. This last time we waited for quite a while BUT they didn't not take our Groupons (so it was free of charge) and we will definitely return and use those Groupons. We also waited a bit the other time we went, but you just have to chill and hang out a bit - it's the beach, and it's worth the wait.