[Let him glitter!!]

That's fine! It doesn't have to be perfectly round. Keep yours in place now, I'll put mine on top.

[While Eren holds on to the topmost snowball after the one at the bottom has flattened out sufficiently to not roll away, Hijikata fills the gap between both with more snow and gradually smooths everything out until they have something like a thick, short pillar.]

Alright! Let's make two more, and then we can start the fine-tuning.

[They definitely are spending more time on this than on the actual snow collection. While they have to widen their collection area now, having gathered a decent amount of snow from the fluffy top layers, it doesn't take them all that long until the new snowballs, one by one, are likewise merged into the base sculpture. Hijikata takes a step back to scrutinise it.]

It looks good! Now let me fix the shape a little.

[He flattens the sculpture a bit - mayonnaise bottles, after all, aren't perfectly round! -, then starts smoothing it further into the right shape, wide at the bottom and narrowing towards the top, where he adds and merges more snow to create the bottleneck and cap.]

See? It's not hard at all.