Chinese characters to use when naming your kid so that they get a cramp writing their name:
16 strokes and up only, non-exhaustive, taken from real names.
燕 yàn - swallow (bird) / 16
凝 níng - to congeal, to concentrate attention, to stare / 16
霏 fēi - fall of snow / 16
霖 lín - continued rain / 16
腾 téng - to gallop, to prance, to soar, to hover, to make room, to clear out, to vacate, verb suffix indicating repeated action / 16
儒 rú - scholar, Confucian / 16
赟 yūn - good appearance / 16
臻 zhēn - to arrive, to reach (esp. perfection), utmost / 16
薇 wēi - Osmunda regalis (a species of fern) / 16
璐 lù - beautiful jade / 17
翼 yì - wing, area surrounding the bullseye of a target, to assist, one of the 28 constellations of Chinese astronomy / 17
霞 xiá - rose-tinted sky or clouds at sunrise or sunset / 17
繁 fán - complicated, many, in great numbers / 17
麒 qí - mythical male unicorn / 19
瀚 hàn - ocean, vastness / 19
耀 yào - brilliant, glorious / 20
巍 wēi - lofty, towering / 20
曦 xī - sunlight (usu. in early morning) / 20
露 lù - dew, syrup, nectar, outdoors (not under cover), to show, to reveal, to betray, to expose / 21
灏 hào - vast (of water) / 21
懿 yì - exemplary, virtuous / 22
麟 lín - female unicorn / 23
鑫 xīn - used in names of people and shops, symbolizing prosperity / 24
Plus some "exclusive" characters for all those who use traditional characters:
These do not meet the criteria in their simplified forms.
穎 yǐng - head of grain, husk, tip, point, clever, gifted, outstanding / 16
龍 lóng - dragon, imperial / 16
興 xīng - to rise, to flourish, to become popular, to start, to encourage, to get up / 16
鴻 hóng - eastern bean goose, great, large / 17
禮 lǐ - gift, rite, ceremony, propriety, etiquette, courtesy / 17
瀅 yíng - clear, limpid (of water) / 18
豐 fēng - abundant, plentiful, fertile, plump, great / 18
懷 huái - bosom, heart, mind, to think of, to harbor in one's mind, to conceive (a child) / 19
鵬 péng - Peng, large fabulous bird / 19
瀟 xiāo - (of water) deep and clear, (of wind and rain) howling and pounding, (of light rain) pattering / 19
寶 bǎo - jewel, gem, treasure, precious / 20
蘭 lán orchid, elegant, graceful / 20
權 quán - authority, power, right, to weigh, expedient, temporary / 21
艷 yàn - colorful, splendid, gaudy, amorous, romantic, to envy / 24
And as a bonus, consider changing your last name to a surname such as:
薛 Xuē, 霍 Huò, 戴 Dài, 魏 Wèi
盧 Lú, 賴 Lài, 閻 Yán, 錢 Qián, 韓 Hán, 鍾 Zhōng, 謝 Xiè, 簡 Jiǎn, 蕭 Xiāo, 顏 Yán, 龐 Páng, 譚 Tán, 關 Guān, 嚴 Yán, 羅 Luó, 顧 Gù, 蘇 Sū, 龔 Gōng
(Definitions adapted from MDBG.)