Mounts for young children to start to learn to horse-ride?

[Anthony Appleyard]

In the real world in settled communities, mounts for young children to start to learn to horse-ride seem to be usually small ponies. But with a nomad tribe, small ponies may not be able to keep up with tribal migrations.

I have seen no mention of Dothraki children riding small ponies .

I heard once of among Mongols in the real world, toddlers being mounted on horse foals a few months old, and the two grow up together.

I heard on Youtube of an old Roman or Greek source that spoke of a horse-riding nomad tribe in central Asia where very young children learned to ride by riding sheep.,