Cruising through the Tulips
You can buy tickets at Keukenhof for boat rides through the bulb fields. They're not sold in advance, so you have to get there as soon as they open and buy right away. They were all sold out by the time I thought to ask.
Next time I go, I'll plan to spend two days here - one with all the gear, the other "traveling light" so I can do the boat ride and the bike rental.