In Patricelli's (Quiet Loud and many others) latest board books starring the single-curlicued, gender-unspecified toddler, the little tyke grows a tooth (Tooth) and graduates from crib to big-kid bed (Bed). Each experience offers challenges (i.e., excessive drooling and fear of being alone, respectively), but the rewards of both are clear. Patricelli's recognizable and cheery acrylics with thick black outlines ramp up the reassurance levels.