Designed to supplement the mathematics-science curriculum, this booklet contains activities which provide children of K-1 grade levels with opportunities for developing mathematics and science skills in experiential ways. Twenty mathematics skills and nine science process skills are listed and indexed for the 15 activities which are seasonally based and focus on spring. Each activity consists of student sheets and a teacher's guide. The teacher's guide contains information on the activities including: (1) topic area; (2) introductory statement; (3) math and science skills; (4) required materials; (5) key questions; (6) background information; (7) management details; (8) instructional procedures (9) student procedures; (10) discussion questions; (11) activity extensions; and (12) curriculum coordinates. (ML)