continuous one line drawing little boy and girl caveman riding woolly mammoth together. kids sitting on back of mammoth. stone age

age ancient animal back background boy cartoon cave caveman child children concept continuous design draw drawing drawn dweller extinct flat girl graphic hand homo human isolated jurassic kids landscape life lifestyle line little mammoth mastodon minimalistic nature neanderthal one park people prehistoric primitive ride riding rocks sapiens savages sign simple single sitting sketch stone together vector woolly