Pineapple tree 5D Magic Letter is a set of creative interactive toys, with 26 solid deformed letters combined with smart devices. It uses augmented reality (AR), artificial intelligence (AI), computer vision (CV) and other technologies, and has *** 10 functional games, among which there are five functional games (experience discovery, picture recognition, parent-child encyclopedia, interactive battle, CV) combined with mobile phone tablet app. There are five ways to play without a mobile phone tablet (deformed letters, professional squares, magnetic spelling, interactive cards, and puzzle chess). Developers have also designed brackets and adapters to free children's hands, so that children can better experience the fun brought by high-tech toys and deeply remember words and encyclopedias. Bololetter is a high-tech children's product for learning English and parent-child interaction. Find the magic spelling of WSLILY, and classify the words close to children's lives such as food, fruit, animals and transportation into the magic spelling function of pineapple tree. Referring to the word list in the instruction manual, put the words composed of different pineapple letters in the stand area in an orderly manner, and then click the glasses function key on the screen to stimulate, and a high-simulation 3D model picture of the real object represented by English words will be displayed on the screen of the mobile phone or tablet computer, and the expansion and contraction of the model can be controlled by fingers. Interesting movements, authentic English pronunciation and Chinese reading, let children learn new things around them while spelling words, and also learn and accumulate English words. Pineapple letters, a good helper for children's English enlightenment!