frog, tortoise and snail

I've been meaning to make Japanese flash cards for Oki for a while now, but keep on getting side tracked. With 48 characters in the Japanese syllabary, and some of the sounds changing by adding dots and little circles, it's a lot to take on and a bit daunting! 

I doodled some ideas for the letter "KA" (か) - かえる, かめ, かたつむり, かさ (frog, tortoise, snail, umbrella), and thought I'd just turn them into illustrations for now. Hopefully, type will follow one day soon...