From the moment they come bouncing into your bed at 5:30 in the morning until they pass out at bedtime, boys go. Sometimes it seems like they have only two speeds -- fast and faster. This means that your toddler could be sitting on the floor shaking a rattle one minute and when you turn your head, he will have summitted the dining room table. When he darts ahead on the sidewalk, you'll be terrified that he's going to run headlong into traffic and your heart will stop regularly as he nearly misses crashing into people and trees. This fear only rises as he becomes old enough to ride a scooter, trike and skateboard. He may not ever slow down, but you will learn to pick up the pace.