3 (boy) and 5(girl). Go to a park or common most days for a couple of hours, rain or shine, since neither of them are at school yet. They just like riding around, prefer to ride in mud, puddles or bits of rolling stuff than actually try to go anywhere. Got an empty pool locally as well that’s got a sculpted bottom, with rollers, and tiny drops, which they love. I’m happy to tag along with them.
Done a few longer rides with them, round Surrey and the South Downs, but always take the kiddie trailer, and they sit in that, with the bikes bungeed on the back, for the ups, and ride the downs. 😕
edit: lol at tomthumb. I’m guessing that’s when they’re not up chimneys or down mines.