The manufacturer lists an Accessory Pack and Charger Pack at $39 each, and a Dev Pack at $119 in introductory USD pricing. Choose by intended use and verify current contents at checkout.
Accessory Pack: for movement experiments
The published pack includes play items such as rollers, a ball, a laser pointer and NFC items. The reason to consider it is a specific activity you want to try. Before buying, read the operating guidance for that activity and think about where you will use it. Extra play equipment does not remove the need for an appropriate space or supervision.
Charger Pack: for session planning
The published charger bundle contains a dual charger and two batteries. Its value depends on how you plan to run sessions. A short occasional experiment and a day of repeated demonstrations have different power needs. Start by observing your usage pattern. Follow the manufacturer’s battery and charging instructions rather than inferring compatibility from a similar-looking accessory.
Dev Pack: for people who expect to tinker
The published developer bundle includes spares and development-oriented items, including motors, cables, batteries and a charger. Compare the complete current list with what you already own or intend to buy. In particular, the presence of batteries and a charger means you should check for overlap before adding a separate charger pack.
Buy for the next project, not every possible project
Make a two-column list: “needed for my first activity” and “might be useful later.” Price the first column with the budget builder. Keep the second as a wish list until experience tells you what is missing. This approach also makes it easier to distinguish a useful spare from an accessory that will spend most of its time in the box.
Go to the source
Reviewed September 7, 2026. Prices, availability and software can change.