Who Tickled Tilly?

A very sweet, gentle story about a search for a mysterious tickler
 
Meet Tilly the lamb, an irresistible character for very young children. Tilly was snoozing in the sun when someone tickled her nose! But when she looked around, no one was there. Tilly decides to investigate, and so begins a gentle search for the culprit. Crow claims he was too busy to tickle her nose and suggests she ask Frog. Frog says no in his bubbly voice and splashes into the water. The baby rabbits shake their head in unison. Who could it be?