Carlstrom and Degen team up for their sixth entry in a beloved series. Cuddly Jesse and his furry family effortlessly explore numbers 1-20 while enjoying simple pleasures that are especially sweet to preschoolers. Carlstrom is at her jaunty best with a series of rhymes for the first ten numbers: In ""Happy Hopping Two Shoes,"" Jesse is ""Jumping high,\Landing loud.\New shoes dancing,\New shoes proud."" Much more is celebrated, including instant photos of the family of ""We three bears,"" four ""thumping, bumping"" bumper cars, ""five alive"" crabs skittering across the sandy beach, seven stars counted with Daddy, up to ""Ten and Back Again"" is especially appealing, with Jesse's careful enumeration of rocks: ""But nine I'll give to Mommy soon,\And ten\Will be my little moon."" Addition is the focus of the final spreads ending with the delicious prospect of ""19 and one more are 20,"" as in 20 ice-cream cones. Degen's now-familiar watercolors are as snug as ever.