Numerical operation ability is an important aspect of early childhood numeracy development, but observations at TK Nurul Ikhlas Kota Bandung showed that some children aged 5–6 years still had difficulty understanding simple addition and subtraction concepts because learning had not optimally involved concrete media. This study aimed to determine the effect of using the Educational Play Equipment (APE) “Berhitung di Taman Bunga” on the numerical operation ability of children aged 5–6 years. This