I learnt to ride at about 8 years of age. Dad bought me a 24 inch bike. He took me out, held the seat for 20 or 30 metres, then let me go. After 3 or 4 goes I was away. Stabilisers are for babies!
I did the same with my kids, only they started at about 4 years age. It only took a few goes (sans stabilisers) and they rode easily.