make a zappy thing, dont run it for longer than 10-15 sec you get what i mean the battery might break or it might overheat idk!

you DONT need to use exactly what i use but make sure the battery is 3.7v not over or less and the step up voltage generator is compatible this is a fun project it is just hard to get everything in the 3d printed body but possible enjoy!  

ok what I use:

boost up generator 

Amazon.com: DEVMO 5PCS DC 3v-6v to 400kV 400000V Boost Step-up Power Module High-Voltage Generator : Electronics

switch

Amazon.com: DaierTek UL Listed ON Off Round Rocker Switches SPST 20mm Mini 12 Volt DC Mini Circle Toggle Switch 12V for Car Automotive RV 2 Pin Switch 120V Wired KCD1-5Pack : Automotive

battery connector

Amazon.com: elechawk 10pcs Upgraded Tiny Whoop JST-PH 2.0 Male and Female Connector Cable for Battery JJRC H36 H67 Blade Inductrix E010 E013 : Toys & Games

battery

Amazon.com: EEMB 3.7V Lipo Battery 500mAh 403048 Lithium Polymer ion Battery Rechargeable with JST Connector Make Sure Device Polarity Matches with Device Before Purchase!!! : Health & Household

battery charger

Amazon.com: Blomiky 1S Lipo 3.7V-3.8V 0.5A USB Charge Cable with JST-PH2.0 Connector Plug Compatible with EMAX Small Hawk S or Free Style RC Drone / 3.7V Ph2.0 USB 2 : Toys & Games