Childcare interview - help please?!

[anonym0us1]

I'm currently interviewing for a childcare post covering early years up to teenagers. I've only ever worked in EY and some KS1/2 in an SEN school. I've been tasked with planning an after school activity for the children for last stage of interview and my mind is drawing blank - there will be approximately 20 children aged between 3 and 10. I've asked how long I'll have but wasn't given a time - I've no idea how to plan an activity that could be developmentally appropriate for all of those children without knowing anything about them 😅 any help would be greatly appreciated

That’s a wide age range to please isn’t it!
what about muffin pizzas?
cut peppers into strips for the children to snip with scissors in to small pieces, bowls with sweet corn, tomato purée and cheese. Pre sliced English muffins. Get a production line going: spread purée, add sweet corn and cheese, snip peppers and add and then pop on to tray. (Write name in pencil underneath on baking parchment) into oven and then they eat for afterschool club snack?

Or simpler ideas: penne bracelets, Salt dough decoration, kindness hearts, junk modeling? Erm I’ve gone bit blank as it’s early😂

A very wide range I thought! I can't imagine any 10 year olds being interested in anything a 3 year old enjoys 😅 I thought of something similar but I've been told they're having snack before I arrive

I’d go with something like Lego.

Guided Instruction for the littler ones and a concept/challenge for the older ones. EG: build something that could discover a new planet. The little ones follow picture instructions to build a simple rocket, the older ones can go wild with their imagination. Maybe print off some inspiration pictures for the older ones who may struggle with their own ideas.

Could you split them into 2 teams and mix the ages up and get them to make the tallest tower out of newspaper and masking tape. Give prizes for best team work, tallest tower etc