esp32
Intel NUC boards
Intel NUC
ESPRESSObin
SanCloud BeagleBone Enhanced WiFi 1G
Olimex A64-OLinuXino
Helios4
Qualcomm DragonBoard
Kano
Robo Wunderkind
Bitsbox
Harry Potter Kano Coding Kit
pip
Raspberry Pi
Lego Boost
HTML Planet for Kids
Based on our record, esp32 should be more popular than Kano. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Esp32.net has a bunch of additional references, projects, and places to gather information. Source: almost 3 years ago
Closest thing is the ESP32 from Espressif Systems See ESP32 link for details. Since you specifically asked for open source, so some tinkering and compile is required. Source: almost 3 years ago
There's also many more dev boards, chips and modules listed here, though they may not necessarily have platformio IDs. Source: about 3 years ago
If the person is into tech, something like these Kano kits. I absolutely love them. Perfect for any age. Source: over 1 year ago
Intel NUC boards - Four-by-four inch Intel NUC boards come with a soldered-on processor.
Robo Wunderkind - Coding and robotics made easy for kids 🤖
Intel NUC - Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Bitsbox - Monthly code projects for kids
ESPRESSObin - Electronics, Single Board Computer, and x86
Harry Potter Kano Coding Kit - Build a wand. Learn to code. Make magic.