Victoria sponge is one of those recipes where the grown-up mood matters almost as much as the ingredients. It is tempting to hurry because everyone can picture the finished cake, but children usually do better if the bake is set up as a sequence of small, satisfying jobs: weigh, mix, spoon, bake, cool, fill. Say the oven and hot tins are adult jobs before you begin, then make the child jobs feel genuinely important.
If you can, soften the butter before you start and line the tins before your child comes over. That avoids the slightly flat moment where they are ready to cook but the grown-up is still wrestling with baking paper. Weighing the eggs first, then matching the butter, sugar and flour to the egg weight, is a lovely way to make the recipe feel logical rather than fussy.
The creaming stage is the place to linger. Children often want to stop as soon as the butter and sugar are combined, but the cake is lighter if it becomes pale and fluffy. You can show them the colour change and make that the goal. An electric whisk helps, but it is also noisy and powerful, so this is a good shared-hands or grown-up-led moment depending on the child.
Once the cakes are in the oven, try not to keep checking. Opening the door too early can make sponge sink, and that is a hard lesson when a child has put their whole heart into it. I usually frame the waiting time as part of the recipe: tidy the bowl, choose a plate, stir the jam so it spreads smoothly, then leave the cakes alone until they are ready.
The filling stage is the joyful bit, but it needs a little patience. Let the cakes cool properly before moving them, because warm sponge is fragile and cream can slump. If the layers are not perfect, that is fine. A homemade cake with a slightly uneven jam layer is still a very successful child-led bake.