Provided are 121 mathematics activities for children aged 3 to 6. Sections include: (1) "Introduction" (describing how to use the book, how to communication with parents, what materials are needed, and how to begin, and also indicating cross-curriculum areas); (2) "Shapes" (describing 20 activities that provide children with an awareness of shapes, primarily geometric ones); (3) "Sizes" (presenting 19 activities for awareness of sizes); (4) "One-to-One Correspondence" (11 activities for matching, counting, and comparing skills); (5) "Counting with Understanding" (providing 20 activities); (6) "Recognizing and Ordering Numerals" (16 activities helping to identify and recognize numerals and begin writing and ordering them); (7) "Parts and Wholes" (providing 7 activities); (8)"Joining and Separating Sets" (helping to develop the concept of addition and subtraction with 13 activities); and (9) "Exploring Tools of Measurement" (14 activities using timers, clocks, rulers, coins, balance scales, and measuring cups and spoons). Parent notes for 10 activities and 26 playsheets are appended. (YP)