Micro Tank Chassis $5
I know there are some other tread lovers here... I first mentioned these mini line follower vehicles (random mix of tanks and construction vehicles) somewhere in my $4 kit line follower kit thread, but today I gutted one and the innards are nice and hack worthy, so IMHO it needs it own thread. Cute as a button cell (powered by 4x of those), there are 2 independent drive trains and beautiful rubber treads. The treads are 2" long installed. A shame my project requires that I gut the cute little PCB with 3mm IR LEDs & phototransistors. The line follower works great, BTW. But someone needs to make a neat little Propeller or Stamp robot from this tiny chassis. Amanda? https://www.ebay.com/itm/Magic-Pen-Inductive-Kids-Toy-Car-Follow-Any-Drawn-Line-Mini-Truck-Tank-Train/112845468455
BTW a black magic marker is included with these "INDUCTIVE"
brand line followers. The yellow construction vehicle included the 4 watch batteries but the tank didn't.
BTW a black magic marker is included with these "INDUCTIVE"
brand line followers. The yellow construction vehicle included the 4 watch batteries but the tank didn't. 
2560 x 1920 - 1M
2560 x 1920 - 1M
2560 x 1920 - 987K
2560 x 1920 - 919K
2560 x 1920 - 995K
Comments
I need to get a commission on the eBay sales I (de)generate!
Here's one that's a US seller, with a low price and free shipping. You need to specify which one to get. I would think the tank and the earth mover are the same chassis, and you'd want to remove the plastic body anyway. Erco, can you confirm?
https://www.ebay.com/itm/Magic-Toy-Truck-Car-MINI-Magic-Pen-Inductive-Fangle-Train-Fire-Truck-Bus-Tank/322563012005
I don't doubt that it's possible. You would have to redo the insides to make room.
Seller is in West Palm Beach. I lived there (actually in Jupiter) for a year and a half fresh out of school working for Pratt & Whitney Aircraft. Good times. Oh, how I miss that Florida humidity and afternoon rain. But jolly good diving!