This summer my 5 1/2 year old discovered a BMX track while on vacation in Boise. He love riding his bike, and hit the track as often as he could. He fell off his bike numerous times, scraped and bruised his hands and knees, but refused to give up. He gritted his teeth, cursed (as much as a 5 year old can curse) to himself, got back on the bike and kept riding the track. The teenagers on the track were really impressed and took him under their "wings". I'll upload a picture or two later.