Festive Cake for Children: A Magical and Colorful Creation!

the syrup:
In a bowl, mix the milk and sugar. Set aside.
For the filling / icing:
In a saucepan, mix the sweetened condensed milk and cornstarch, and mix well to dissolve completely.
Add the egg yolks, milk and heat over medium heat, stirring constantly, until boiling and thickened.
Cook for another minute, then remove from the heat.
Add the cream and mix to incorporate.
Transfer to a bowl, cover with plastic wrap and leave to cool.
Divide into 3 equal parts and place in 3 containers
(for the 2 fillings and the icing, so as to have the same quantity for all the layers).
Assembly:
Line the pan used to bake the cake with plastic wrap, leaving some edges hanging over.
Place half of the dough in the pan, baste with the syrup and add some of the filling.
Cover with another half of the dough, baste again, then add the filling.