Absolutely right, this weighs more than my adult bike! Yes its cheap but so it should be, overpriced junk. Get something decent second hand ... always loads of good cheap kids bikes around as they only last a year or two (and loads of kids are little fatties that never go outside anyway so are hardly used). Avoid these junk or your kids will definitely be the one of the fatties watching Paw Patrol.
10 kg bike for toddlers? It's a no no. Way to discourage them to cycle.