Thinking of giving it a go? Here's what to know.
The filter actually comes from the video-editing app Capcut, which features AI technology. ByteDance, the company behind TikTok, is also the maker of Capcut. On that note, the apps can easily work in conjunction with each other.
You must download Capcut to participate in this trend.
TikTok creator @rugview shares a very informative video on how to access the filter.
In Capcut, head to the search bar and type in "childhood trend." After hitting enter, choose the second option. Once you click on the video, look toward the bottom of your screen, where it should read "Use template." Select that.
Next, you should be prompted to upload a photo of yourself. Once that's done, Capcut will work its magic and share your results with you. Feel free to mess around with the editing tools in CapCut. When you're done you should be able to open the video in TikTok and share it with your followers.
Before posting, many people have been pairing their videos with this original sound by Nando. However, there is no right or wrong song to play in the background of your video. Creators partaking in the trend have also been writing text over the video that explains what the filter is doing. For example, you could write: "This filter shows what my future child will look like."