I don't have kids and I don't claim much knowledge, but lots of concepts of "normality" seep into their little brains without anybody realizing it, and that a bunch of kids spent 4 years with the bad racist orange man as "the president," even if they agreed with their parents that the dude sucked, can't be entirely healthy. Re-warping their brains with some different representation will hopefully be healthy.
Day 1 of the failed Biden/Harris administration!