Ideas for almost no-cook treat pudding for terms to make

[Nutellanjam]

My dd will have a few friends over for bday sleepover (14/15 year olds). I will prepare bulk of dinner but they will serve up themselves and have free run of kitchen for the evening, so they can have space to chat/ eat/ hang out.
they all love cooking so would prob all like to make themselves a treat dessert. But pref something that doesn’t need hours of prep/ cooking .
Does anyone have any suggestions of lovely treat pudding, with ideally no or minimal cooking time that can be assembled in a fun way while they chat and then enjoyed?
thank you so much!!

meant teens not terms!

Chocolate biscuit cake or chocolate mouse are both easy and no cook.., also Eton mess if you use ready made meringues..

Ice cream, cookies, sauces and sprinkles/m and ms etc.

Mine love pretend cheesecake. You just spread digestive biscuits with Phildelphia or similar (I think mascarpone would also work) then top with the jam or other topping of your choice (sugar free jam works better because it tends to be runnier).
It tastes like cheesecake, honest!

The old school chocolate crackle cakes are always a hit here.

In a pan warm together 30g cocoa, 200g golden syrup (from a tin or they’re too runny) and 100g butter until it’s smooth and melted. Stir in 200g of cornflakes and spoon in cake cases.

Stick them in the fridge. They stay gooey and lovely and I much prefer them to the ones with just chocolate. You can put any sprinkles etc on top when still warm.

Do a base like cheesecake (digestives crushed and melted butter) then top with a 50-50 mix of mascarpone and lemon curd. Then decorate with what you want- raspberries for me but you could use chocolate etc.

Individual mug cakes?
Or DD had a hot chocolate station at a similar sleep over that went down well- hot chocolate in a slow cooker with a ladle then lots of different toppings to choose from

An Ice cream sundae freak shake or pancake station,

Cookies or cupcakes made ahead that they could decorate themselves,

Mug cakes

My husband who never cooks surprised me with a chocolate lava cake recently. It took half an hour I think. Just like the M&S melting middle large pudding that they seem to have discontinued

Microwave cakes
S'mores - spread Nutella on a biscuit add marshmallows (slight melted is best) top with another biscuit