Bathroom is fine as is for kids. Add a poster to the wall over the toilet and a valance on the window

Thanks -- the white floor/grout doesn't bother you? My wife really doesn't like grout lines but also thinks the countertop clashes and was considering replacing it with something white and then painting the vanity.

Hi! Your ideas sound great! Vinyl flooring and updating the paint on the top half of the walls will make a significant difference. Replacing the vanity would be a nice upgrade and the rest could be done through décor. Décor such as rugs, window and or shower curtains and shelves or art on the wall. Hope this helps! Best of luck!

New countertop, sink and faucet would look great. You can get a small remnant of stone or quartz usually pretty cheap. The floor is fine IMO. I might color/paint the grout white. Let your kids pick a fun new shower curtain and then coordinate paint, rug window treatment, and art with that. I like the vanity white.