The European Space Agency has been running a few competitions lately, including a draw an asteroid one as part of ESA kids. The winners of that competition have been announced and a gallery of entries published.
Meanwhile, over in the USA, the Discovery Education 3M Young Scientist Challenge is up, running and taking entries. There is an online registration form to fill in, followed by parents’ consent and then a two minute video is to be uploaded showing why the 5th-8th grade kid is America’s next big thing in science. More details here.