Reaction ball (Paypal avaliable for small order quantity) Main purpose is for training the reaction abiliy with the irregular rebound direction. More feature and detail as below:1. Coated with specialized material, durable but pleasant to touch.2. Made of special macromolecule material, safe, non-toxic, environmental friendly.3. Flat-free, do not need to inflate regularly, and the rebound is same in any season.4. Awarded the certification of international safety standard of toys for children under four years old.5. Awarded the SGS certification, free of ten major heavy metal materials and chemical materials, such as toluene or formaldehyde; and meet the European and USA safety standard for children's toys.(EN-71 Part 1~3, 9~11, Cadmium and DIN53160(Saliva & Perspirattion)6. Different colours can stimulate and improve children's thinking capacity  //586 || this.height>586){ if(this.width>this.height){ setImgSizeWH("",this,586,586*this.height/this.width); }else{ setImgSizeWH("",this,586*this.width/this.height,586); } } } } //]]>