• Smart Math Roller Stamps For Math Problems: one addition stamp or one  subtraction stamp, 1 Bottle of Ink per Pack 
• The Pink Stamp Has Subtraction Only 
• The Blue Body Stamp has Addition Only 
• Interesting School Supplies :The math stamp set as fun as toys, makes learning fun and exciting, increase children's interest in learning ! suitable for students to practice, parent guidance, teacher teaching
• Save Time: Easy to operate ，the math questions can appear in front of you by scrolling the stamp, which can be adjusted, and the questions can be changed by gently twisting the button, and the questions will be randomly selected.
• Good Quality: photosensitive process, clear stamping, Print thousands of impressions without losing the original quality,Strong ABS plastic components and housing
• Refill Pack: Durable Equipped with  Free refills ink, open the oil cap and drop 5-6 drops at once
• Assorted Colours based on availability will be delivered.

• Best Gift for Kids 6-14 yr girls & boys: Build, Play, Learn,197 Parts,BUILD TIME: 120 min, STEM Concepts: Gears and Gear-Train, Energy Transfer, Friction
• Screen Free Fun : Longer Constructive Activity,Multiple Gameplays,Core STEAM Learning and Superior Engagement Time Per Rupee than other DIY toys
• Children Learn Best Through Play: Smartivity helps in Brain Development of your child with STEAM Concepts based game/toy with Real Moving Parts & MECHANICAL ACTIONS
• Trusted By Parents, Loved By Children in 24 Countries (incl USA, Europe): Non-Toxic & Safe. Tested in global labs. Exceeds global toy safety standards. India's Global Brand
• Eco-Friendly, Engineering wood: Imported Premium Pine Wood. Sourced from Responsible Eco-Certified Vendors. “NO SPLINTERS” so that your child is protected
• No Mess, No Tools Needed for assembly for a clean, MESS-FREE HOME, Elastic Bands joinery, Easy to Disassemble and Reassemble
• Easy,Age-Apt Instruction Book with Instructional Videos: One-Step-Per-Page, Big Pictures, MODULAR ASSEMBLY for self-paced construction. Minimal adult involvement

Smartivity Roller Coaster Marble Slide STEM DIY Fun Toys, Educational Construction based Activity Game for Kids 8 to 14, Gifts for Boys & Girls, Learn Science Engineering Project, Made in India

• Best Gift for Kids 8-14 yr girls & boys: Build, Play, Learn,143 Parts,BUILD TIME: 150 min, STEM Concepts: Collisions,Momentum Transfer & Conservation of Energy
• Screen Free Fun : Longer Constructive Activity,Multiple Gameplays,Core STEAM Learning and Superior Engagement Time Per Rupee than other DIY toys
• Children Learn Best Through Play: Smartivity helps in Brain Development of your child with STEAM Concepts based game/toy with Real Moving Parts & MECHANICAL ACTIONS
• Trusted By Parents, Loved By Children in 24 Countries (incl USA, Europe): Non-Toxic & Safe. Tested in global labs. Exceeds global toy safety standards. India's Global Brand
• Designed by IIT Alumni in Collaboration With Children: Evaluated and approved for Construction, STEAM Learning and Fun Quotients by Smartivity STEM Ninjas.
• Eco-Friendly, Engineering wood: Imported Premium Pine Wood. Sourced from Responsible Eco-Certified Vendors. “NO SPLINTERS” so that your child is protected
• No Mess, No Tools Needed for assembly for a clean, MESS-FREE HOME, Elastic Bands joinery, Easy to Disassemble and Reassemble