My son was 4 and he started with real skis and boots. My daughter was 2 the same winter. We got her the plastic strap on skis, and we towed her around with the wooden hand-held T-bar (forget what it's called now). They weren't expensive, and it was fine for her-- she went to ski day care while her brother was at ski school and after we picked them both up, we'd pull them around on the bar. The next year, when she was 3, she was still too young for ski school but wanted to ski. She had real equipment, and we put her in half day day-care at the mountain and after lunch, we taught her to ski. We used tip clips, and skied right next to her, helping her learn to turn. The year she was 4, she did a seasonal Sunday program. That year, no more tip clips and she went from wedge turns on easy greens at the beginning of the season to her first "black" at Butternut (really more like a blue) by the end of the season. She was so proud! Now, she's 6 and happily skis all blue terrain (real blues), loves bumps and trees, but is still scared of steep and icy sections (quite sensibly). My 8 year old son skis blacks and bumps and trees and we keep revising down our estimate of when he'll better than we are!