Great question—“track cube” here refers to a couple of toy types:

• 3D modular cube train sets: Snap-together blocks form rail routes, and a small electric or rechargeable vehicle runs through the paths you build.
• Twist puzzles and maze cubes: Classic 3x3 (and larger) speed cubes for solving, plus gravity-style maze puzzles that guide a ball through tracks.

To zero in on what you want, browse by category (Trains & Train Sets, Puzzles, STEM Building Toys) and check each item’s title and age range. Product pages list what’s included and who it’s for, which can help you choose a fun fit for your builder or solver.

Think about experience level and feel preferences, then look for these features:

• Magnetic stabilization: Magnets can help pieces align for smoother, more controlled turns.
• Adjustable tension: Some cubes include tools to tweak tightness for a lighter or firmer feel.
• Stickerless vs. stickered: Stickerless plastic avoids peeling; stickered can offer a traditional look.
• Size and complexity: A 3x3 is a friendly start; larger cubes add challenge.
• Smart capability: Some connect to an app for timing and training.

Check each product’s specs for weight, magnet type, and adjustability. Reading the item description and reviews on Walmart can help you match a cube’s feel to how you like to solve.

Power can vary by set, so it helps to check each item’s details:

• USB rechargeable vehicles: Many sets include a cable to recharge the train or car.
• Replaceable batteries: Some use standard batteries; the size and quantity are listed on the product page.

Helpful tips: Use the included cable and follow the manual’s charging times, power off when not in use, and keep components dry. If you prefer low-maintenance play, rechargeable options can be convenient; if you like quick swaps, battery-powered sets may suit you. Availability and run times can differ by model and usage.

Expansion options depend on the specific set and seller:

• Check the product page: Look for mentions of expansion packs, additional piece counts, or compatible add-ons in the description.
• Browse related listings: Some series offer multiple sizes (e.g., different piece counts) that build on the same system.
• Contact the seller: If you need a replacement part or extra vehicle, use your Walmart order to message the seller and ask about availability.

Since compatibility varies, it’s a good idea to stick with the same series when adding pieces. Stock and options can change over time based on the seller’s inventory.

Smart cubes typically pair to a companion app via Bluetooth. The product page will list the app name and device requirements.

• Setup: Download the app, enable Bluetooth on your device, and follow the on-screen pairing steps.
• Features: Many apps time solves, log statistics, suggest scrambles, and may include tutorials or virtual competitions.
• Compatibility & privacy: Review the app’s minimum device specs and permissions, and supervise younger users as needed.

Connection stability and features can vary by device and app version. Checking the item description, user reviews, and the app listing can help you confirm what’s supported before you buy.