11 books • 2 series
AyJay's Millions
Measuring Up
Why Do You Suppose? (Smart Start)
What's Alike? What's Different? (How Did We Find Out about ...?) (Smart Start)
Kid Skills-Judging
Kid Skills-Hypothese
Kid Skills-Deciding
What If? (Smart Start)
What to Do? (Smart Start)
What's Good? (Smart Start)
What Do You Think? (Smart Start)