Dav Pilkey! @librarycongress @CampbellAPS @APSLibrarians By @CampbellAPS | October 11, 2019 Dav Pilkey! @librarycongress @CampbellAPS @APSLibrarians https://t.co/LH1r3zFu1u Posted in Daily News and tagged @CampbellAPS ← Music Hopes and Dreams @APS_CampbellMus Using K-Nex to make simple machines while learning to work together. @CampbellAPS @APSscience →