dabble

(verb) dip a foot or hand briefly into a liquid.

(verb) play in or as if in water, as of small children. Synonyms: paddle, splash around.

(verb) work with in an amateurish manner. Synonyms: smatter, play around. Examples: "She dabbles in astronomy." "He plays around with investments but he never makes any money."

(verb) bob forward and under so as to feed off the bottom of a body of water. Examples: "Dabbling ducks."