Mr. Math vintage 1972 teaching aid tools: 16,200 ppm Lead (90 ppm and up is unsafe for kids)
1970s Toy | 1972 | 2021 | Educational Tools | Educational Toys | Math Spinners | Mr. Math | Teaching Aids
May 9, 2021 — Sunday For those new to this website: Tamara Rubin is a multiple-federal-award-winning independent advocate for childhood Lead poisoning prevention and consumer goods safety, and a documentary filmmaker. She is also a mother of Lead-poisoned children (two of her sons were acutely Lead-poisoned in 2005). Since 2009, Tamara has been using XRF…