וּלְמַ֡עַן תְּסַפֵּר֩ בְּאׇזְנֵ֨י בִנְךָ֜ וּבֶן־בִּנְךָ֗ אֵ֣ת אֲשֶׁ֤ר הִתְעַלַּ֙לְתִּי֙ בְּמִצְרַ֔יִם וְאֶת־אֹתֹתַ֖י אֲשֶׁר־שַׂ֣מְתִּי בָ֑ם וִֽידַעְתֶּ֖ם כִּי־אֲנִ֥י יְהֹוָֽה׃
And so that you shall recount to your son and your son's son how I played with Egypt, and the signs that I set among them, and you shall know that I am Hashem. [Shmos 10-2]
התעללתי - Rashi says "שיחקתי". I played [or laughed].
Wow!! Hashem, כביכול, "played around" with the Egyptians! He, כביכול, was having a GOOD TIME!
We tell our children this. Children understand playing around with things.
Takeaway: Playing is a positive thing if done for a good reason.
