We took out savings policies for DC when they were born, not much but it grew, we topped it up, when we had a small unexpected legacy so they both had the deposit on their first property.
DS was a post graduate when we encouraged him to get on the housing ladder as prices were rising rapidly, so I bought the house because I could get the morgage, but DS paid the deposit and paid the mortgage and had a third share in the house. When he moved on a few years later, prices were still rising, so I bought him out and he had enough deposit, in a cheaper area, to buy a house entirely on his own account and with a mortgage because he was working.
The other way we helped our AC was because we are serial house improvers and could help them do renovations, both were able to get buy rundown properties, which we renovated with them, so they quickly had growing equity in their homes.