In mishna Keilim 24:1, we see that a toy shield is not susceptible to tumah:
שְׁלֹשָׁה תְרִיסִין הֵם. תְּרִיס הַכָּפוּף, טָמֵא מִדְרָס. וְשֶׁמְּשַׂחֲקִין בּוֹ בַּקֻּנְפּוֹן, טָמֵא טְמֵא מֵת. וְדִיצַת הָעַרְבִיִּין, טְהוֹרָה מִכְּלוּם:
There are three different types of shields :A bent shield is susceptible to midras uncleanness; A shield used in the arena is susceptible to corpse uncleanness; And the Arabian toy shield is pure from all uncleanness. [from Sefaria]
Is this a general rule for toys, that they're not susceptible to tumah? There are toys, like (metal) bowls and pots and pans used for a toy cooking set (for example), that can contain other objects (יש להם בית קיבול) — would these also be insusceptible because they're not used for actual cooking?