Appealing to childrens natural instincts to sort and collect, these durable and tactile pebbles can be used in sand and water both inside and outdoors.Each pebble is cast from a special stone and resin mix and engraved and handpainted with a numeral making then highly appealing.Perfect to encourage childrens fascination with numbers.Each set includes a leaflet full of ideas and activities.YUS1010 Number Bonds to 10 (22 pebbles) contains two of each of the numbers 010.Correlation to Common Core: K.CC.A.13, K.OA.A.14.Correlation to ECERSR: LanguageReasoning 16; 17, Activities 23, 26.Correlation to ITERSR: Activities 15, 21.