I've suckered my kids into a choc ripple cake birthday tradition. Initially because I am a cake fail, but it is actually a really fun activity to head to the shops together and choose ingredients, because most bikkies work, we've used ginger snaps and butternut snaps too, with any flavour cream, and then super easy to decorate. And you won't need an oven, just some patience while it softens. (Pro tip: bikkies stuck on the outside make good wheels)

Can you ask him what he'd like to do, with some suggestions to guide him? Sometimes I have huge ideas for mine and they just want to play cars with me and then watch 400 episodes of Mr Maker on iview.

If I was offering cheap options, feeding ducks at a local pond, a library trip or a 50¢ cone and playground trip would all be on my radar. Hope it's a lovely day. =)