10 Science for Babies Board Books, by Chris Ferrie and others: General Relativity, Rocket Science, Quantum Physics, Newtonian Physics, Organic Chemistry, Bayesian Probability, Optical Physics, ABCs of Mathematics, ABCs of Physics, and ABCs of Space. Sturdy board books, 8” x 8” (the larger size). Very good condition, some slight wear on edges. Text only. Cash or Venmo. Discount on multiple items.