Genki English has some fun enthusiastic ideas - using songs, actions and movement. I've also watched a couple of his demo lessons with young learners to get some ideas on how I can behave as a teacher. Of course, with Covid-19, some of the activities (ie getting them to run to the flashcard on the wall and touching it) will probably not be possible to be used. But you could have the students turn around and point with both arms (or with their head, their leg, their elbow, nose, book) to it. Or have the flashcards up high on the board or down low and students can stand up/sit down depending on the word you use.
Songs, music and dancing!If you need some material for grade 1 and 2, here are some channels with songs that are level appropriate and fun:-Super Simple Songs-Pinkfong-CoCoMelon Getting them to learn the actions with the songs can be pretty fun!Also, if you want to be *super* cool, find a secondhand guitar (I've seen 'em on FB groups for as cheap as 20k), spend 20 minutes to learn 1 or 2 chords, and kind of make noise along with the tv. Worked for me! Also: colouring!The internet has oodles of doodles that are great for colouring. Many of them have English letters and stuff that they can colour, which makes it genuine English learning material.