What are you counting? Are you counting the types of flowers?
Hey Alex, what are you counting?
(ねぇアレックス、何数えてるの?)
The types of flowers, huh?
(あ、お花の種類ね)。
または、
Are you counting the types of flowers?
(お花の種類をかぞえてるの?)
How many types are there?
(何種類あるの?)
Tell mommy.
(ママに教えて)。
参考までに!